The plot of this season is based on real events. The series returns the viewer at a time when, in 1836 in Texas were military operations. It all started with the fact that the president of Mexico has offered the public a new constitution, which presupposed the abolition of the labor force. This proposal was not successful and caused a denial of Texas government. That is what was the cause of discontent and conflict that served as the foundation for the beginning of the war.
The uprising the general of Texas against the general of Mexico, was with a view to separate Texas from Mexico, and to recognize his as a separate state.
The clash of the two armies Texas and Mexico has led to great loss of population. The Texas Army had far more losses. After that, Sam Houston headed the Texas army, it was he got a victory in the favor of Texas. So after a year, Texas acquired the title of the Republic of Texas. In result, they got their after going through this difficult path.

Texas Rising season 1 episodes list:

Episode #1:
From The Ashes (air date: 2015-05-25)

After the brutal defeat at the Alamo, the fearless Texas Rangers, under General Sam Houston's command, fight for revenge against Santa Anna's troops.